Understanding Binoculars: Aperture

In this Eagle Optics video we talk about how the size of a binocular's objective lens (the big one in the front) impacts the users experience and what effect it has on a binoculars use and capabilities. Enjoy!

Category:

Howto & Style

Tags:

• eagle optics
• aperture
• binoculars
• binos
• birding
• birdwatching
• bird-watching
• bird watching
• magnification
• objective lens
• binocular lenses
• binocular numbers
• outdoors
• exit pupil
• optics
• understanding binoculars
• how to use binoculars

[jud1255]

what sort of magnification would i require for face recognition @ 500yards

[eagleopticsvids]

@jud1255 You would likely need to use a spotting scope or similar instrument that would start at around 20x power. With that much magnification, be prepared to use a tripod for stabilization.

[jud1255]

does it not make for wider viewing if going say from 20x 50 to 30 x 80 , does it mean that at 80mm i would still see the same width of view as the 50mm

[eagleopticsvids]

@jud1255 The second number (following the x) is the size of the front lens. That lens collects light and does not generally have much of an impact of field of view, unlike the first number which is the magnification. The lower the magnification, with wider field of view you have. 20x magnification generally has a wider field of view than 30x.

[watson225450]

very good info. thanks

[jud1255]

would this be suitable for face recognition at 50 yardes Yukon 6-100x100

[jud1255]

thanks 

[MaoOutlack]

thanks for uploading... good info...

[MyTruths1]

Nice video. Excellent information.